Multistage centrifugal pump.



G. SULZER,

MULTISTAGE OENTRIFUGAL PUMP.

APPLICATION FILED MAR. 14, 1911. RENEWED JULY 7, 1914.

Patented Feb. 23

' MSW-T 1 '1 will l w ll?" lied A; Letters FQetest.

ihppllcetiozx filed lllerch 14, 1911, Serial No. {514,307. Renewed July *3, wi l. flerial Filo. 8%,65.

To all whom it may concern:

Be it known that l, Gsohc SULZER, s citizen of the Republic of Switzerland, residing at Harrison, county of Hudson, and State of New Jersey, have invented certain new encl useful Improvements in l'lultistsge Centrifugal Pumps, fully clescrihed. and

represented in the following specificationattention the pump being especially adapted. for house tank" SGI'VICG or other uses where the pump 1.8 not run by a slnllecl engmes...

In the accompanying drawings forming a part of this specification, there is shown for the purpose of illustration, a two-stage pump of the preferred form embodying the inyention, and this pump will now he (lescribcd in detail, and features forming the invention theri specifically pointed out in the cl aims.

In the drawings, Figure l is 'a. vertical central section of the pump. Fig. 2 is a sectional elevation on the line of "Fig. 1 partly broken away to show the construction. Fig. 3 is a. partial horizontal section on the .llllG 0t Fig. Fig. 4: is a partial section on the line -l-' of Fig. l.

Referring; to the (ire-Wings, A A cue the first and seonrl impellers, carried by the shaft l these impellers being revcrsecll; as cdbclnnce the pump without the Lid of special balancing devices. The casing? is shown formed of a suction heecl and. delivery hearl l with the partition plate ll separating the impeller chambers, these parts conveniehtlv being bolted together to Torr-o. erasing, as show" 111d the two lmuls rnrryl respectively the suction connection H! and delivery connection ll. 'lhc shai't li mounted in any common or suitable manner in the heads C l). and the howls of impellers A A. preferably abut and run in an opening" in the partition plate F. as shown, no pricking between the impellcr chznnl'lcrs being requireol, sml sim- )ort of the shaft in the partition ielete E coins; 'th us ji-FUViflRCl.

In assembling the parts it is obvious that the impeller A may he slipped place 14- in head D, for impeller A, and the second impeller A delivers through its volute formed by well 15 on the inner siale clhead I) to the delivery 11. Ample space is provided for the cross passage 13 outsitle the points of the volutes, Without increasing the cross dimension of the pump heyon-(l that required for the capeolty desired.-

It Will be seen that the invention provicles a. pump excellently adapted for house tzmlc and similar service Where a very pump that is simple, durable, enrl has no parts to get out of or ier, or requiring .lerl attention, is desired.

What ll claim is:

l, A centrifugal pump having two-single suction impellers arranged back to heel; with their single suctions in opposite cliree tions ancl with volute deliveries, and; e per-- fill titioii between the pump chambers, the velute of one impeller delivering through a cross passage directly to the suction pas sage of the other impeller to form e two stage pump. A centrifugal pump having two single suction impellers arranged hack to leach" with their single sections in opposite clireclions and withvolute deliveries, {3.116. e. per-- tltion plate he:- solute one speller (leliveringg through at cross pz'issege in the partition plate to the suction passage of the other impeller to form :1 pump.

A. centrifugal pump having; two Slll- ;z le suction impellers errsne'erl heel: to back with their single sections in opposite direc tiohs 51ml with voliite cleliveries, and titioh plate between the pump chambers, the

volute of one impeller clelirering through s.

cross passage in the o artition plate to the suction posse of the seen the pump chemhers.,the

amii forming respecfiively he \olutes for the fir a and second impellers.

. 2-. The. cm'nbination with reversed impellers A, A, of parbition 19 having cross pmsago 13 from the clmmbm' of impeller A, suction passage 14 for film impeller A c0nnesting with passage 13. and suction and dolivery heads forming 'volufo impeller chambers on opposite sides of the partition.

5. The combination Willi reversed impellers A, A, partition E imving cross pas Sago 3 from the r-lmn'xboi' of impeller A, snot-ion passage M for the inrpellor A com G-EORG SULZJE'R.

A, GRAVES,

i J. SAWYER. 

